# 3.4.4.4. PCA¶

PCA

This tab allows for the PCA (Principal Component Analysis) of bands loaded in the Band set.

A report .txt is saved along with the PCA bands, containing the covariance matrix, correlation matrix, eigen vectors, and eigen values.

## 3.4.4.4.1. Principal Component Analysis of Band set¶

• Select input band set : select the input Band set;
• Number of components : if checked, set the number of calculated components; if unchecked, all the components are calculated;
• Use value as NoData : if checked, set the value of NoData pixels, ignored during the calculation;
• BATCH : add this function to the Batch;
• RUN : select an output directory and start the calculation process; principal components are calculated and saved as raster files; also, the details about the PCA are displayed in the tab Output and saved in a .txt file in the output directory;